Austrian legend and now Mercedes chairman Niki Lauda has admitted the Anglo-German team is "constantly learning" amid the challenge of preparing for 2014.
The triple world champion adds the team remains focused on getting this year's car, likely named the W05, ready for the opening test in Jerez where the team usually launches it's new creation.
That commitment comes as rumours suggest Red Bull boss Christian Horner has mooted the idea of delaying the opening pre-season test by a week.
"Nothing is being moved," Mercedes team chairman Lauda is quoted as saying on motorsport.com. "The plans are going ahead for late January.
"The task of big for everybody."
Currently the new V6 turbo engine and accompanying ERS unit are being tested on the bench at their engine facility, before making their track debut in Spain.
Speaking of the challenges of the new V6 era, Lauda admitted cooling was perhaps the biggest hurdle the designers and engineers were having to overcome.
"We are constantly learning new things," he said. "Suddenly you are managing things like water pressure and intercooling.
"Oil and water must be in a precise temperature window," added Lauda. "Once you go just a few degrees above a certain limit, everything stops (working)."
The Austrian has admitted he has some sympathy for the nine customer teams in F1 who are unable to complete "any comparison testing".
"They are doing their cooling (development) only on the basis of information provided by the engine partner," said Lauda.
He does however, believe Mercedes and Renault may have a slight edge on Ferrari in terms of developing and improving their 2014 units as they have the feedback of four teams compared to three for the Italian team.
"Four teams is four sources of information," said Lauda. "Everyone is having their individual problems, so we can learn faster and respond sooner."
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